William I of Geneva ( – 25 July 1195) was Count of Geneva from 1178 to 1195. He was the son of Amadeus I, Count of Geneva and Matilda de Cuiseaux. William married Agnes of Savoy. They had: Humbert Following his first wife's death c. 1172, William married Marguerite Beatrice de Faucigny, they had: Marguerite of Geneva, wife of Thomas I of Savoy William II of Geneva William's third marriage, to Beatrice de Vaupergue, his last wife was childless. He died at the Château de Novel in Annecy, France. References Sources Counts of Geneva House of Geneva 12th-century nobility 1130s births 1195 deaths Year of birth uncertain